You made the claim of "valvetrain stability", so please enlighten me. What does my testing have to do with anything in this arguement? I know my stuff regarding oil.

SB don`t get sucked in.. Borgie does not play well with others.
Borgie your first post was informative and impartial.. the rest are just insults and put down because someone does not share your opinion.
You give no credit to guys who have been running and taking apart motors on a daily basis? Based on what? Articles you`ve read? Is there any real world experience on your part..(seriously I have no clue what your occupation is, maybe its a chemist??)

My guess would be most oil companies aren`t bringing in 900hp DYI motors to test so the only data comes from the field.

Someone around here has been exuding narcissistic traits the last couple days , not to mention any names . Intelligence with zero common sense is worthless . Talking down to well respected and admired members in such a condescending tone , well I hope you never need their help because I'm sure none will be forthcoming .

Nobody is being sucked in here. The way I see it this Is a debate. Do you have anything to offer besides sticking up for your friends as per usual? Not trying to bust your ballz, I just don't see this as an attack. SB wants to talk oil, I want to see if he's credible. He wants to turn this into something its not(ie viscosity of oil as it pertains to failure).

Intelligence with no common sense, well that's interesting... Sorta sounds like "your opinion". For a second here let me make you aware of something DEEP, I enter into discussions to which I'm well versed in. I don't come on here and start taking about my expertise in blowers, prop selection, outdrives etc. These are things I'm still learning, and honestly some which I will probably continue to know little about. That said, I'm not an "expert" in lubricants but I know quite a bit to get by. It's funny to see people here assume they know my background. That's fine as I prefer a certain level of anonymity anyways. I'm certain you wouldn't label me a narcissist if I started talking about fountains for example, and one of these members interjected.

You can feel free to post an intelligent and common sense response to this lack of common sense you are citing, because to be honest I can't quite recall..

Again my point is, just because 15w-50, 20w-50 "work" they aren't always optimal. There is more to oil than viscosity when discussing "film strength" for example. I never once brought engine failure into the picture here. Most here don't even pull a UOA.

lets all just try to get along.relax borgie you are well versed about oil,no one id disputing that.i run 15-40 oil in marine engines under 700 hp,above that i like 20-50.i always use good quality oil.when we dyno them i always put a small load on the engine until i see 160 min temp before pulling on it.in my 2012 honda i use 0w20 amsoil.imo there is no magic theory on what oil to use.myself and some of the others posting on this are just stating what works for them.we all have different ideas about oil but at the end of the day whatever works for you is a winner!i was at the local farm&fleet today and came across 5 gallon buckets of mystic 15w50 semi synthetic for 55 bucks.from what i have heard about mystic products i think i will try this in the next higher hp build.i pay attention to some of the respected members here and have learned from them and there experiance.

I agree Mike. Maybe I do get a little "overly passionate", however I do appreciate the knowledge here shared from you and others. There is no magic oil as you said, however I just want folks to know that heavier isn't always better. To each their own.

Yes, mystic is a great product which I have used personally. They are now owned by CITGO.

I think you should try that 0w20 in your 1200hp marine engines mike! And remove the oil coolers. As long as you use a boutique oil you should be just fine. Prob pick up a couple mph and be PLEASANTLY SURPRISED how it works out at 6500rpm

I like they mystik greases and gear oils, so i bought some 15w50 mystik oil from the farm store. Its already in my oil pans for next summer. Icdedppl is using it too now. The price is nice. Ill gladly change it out more frequently at the price point its at.

i think a 500 hp street car engine would not need to worry as much as that same engine in a heavier boat because it is not going to get run as hard for long periods of time.i agree with you,a low hp street engine would do better with a lighter viscosity oil,espically in my neck of the woods.it gets mighty cold around here in the winter.i get a little woried about the 15w40 in my diesel truck in the winter.in my gm trucks[gas]i run 5w30 all year.